diff --git a/core/modules/system/system.libraries.yml b/core/modules/system/system.libraries.yml
index 041e16f..2fb4bb3 100644
--- a/core/modules/system/system.libraries.yml
+++ b/core/modules/system/system.libraries.yml
@@ -20,9 +20,6 @@ base:
       css/components/sticky-header.module.css: { weight: -10 }
       css/components/tabledrag.module.css: { weight: -10 }
     theme:
-      css/components/action-links.theme.css: { weight: -10 }
-      css/components/breadcrumb.theme.css: { weight: -10 }
-      css/components/button.theme.css: { weight: -10 }
       css/components/collapse-processed.theme.css: { weight: -10 }
       css/components/container-inline.theme.css: { weight: -10 }
       css/components/details.theme.css: { weight: -10 }
diff --git a/core/themes/classy/classy.libraries.yml b/core/themes/classy/classy.libraries.yml
index 15d8266..fd2b032 100644
--- a/core/themes/classy/classy.libraries.yml
+++ b/core/themes/classy/classy.libraries.yml
@@ -2,9 +2,12 @@ base:
   version: VERSION
   css:
     component:
-      css/components/pager.css: { weight: -10 }
-      css/components/more-link.css: { weight: -10 }
+      css/components/action-links.css: { weight: -10 }
+      css/components/breadcrumb.css: { weight: -10 }
+      css/components/button.css: { weight: -10 }
       css/components/exposed-filters.css: { weight: -10 }
+      css/components/more-link.css: { weight: -10 }
+      css/components/pager.css: { weight: -10 }
     theme:
       css/layout.css: {}
 
diff --git a/core/modules/system/css/components/action-links.theme.css b/core/themes/classy/css/components/action-links.css
similarity index 100%
rename from core/modules/system/css/components/action-links.theme.css
rename to core/themes/classy/css/components/action-links.css
diff --git a/core/modules/system/css/components/breadcrumb.theme.css b/core/themes/classy/css/components/breadcrumb.css
similarity index 100%
rename from core/modules/system/css/components/breadcrumb.theme.css
rename to core/themes/classy/css/components/breadcrumb.css
diff --git a/core/modules/system/css/components/button.theme.css b/core/themes/classy/css/components/button.css
similarity index 100%
rename from core/modules/system/css/components/button.theme.css
rename to core/themes/classy/css/components/button.css